CN206705904U - A kind of urban sewage treating device using second pond intermittent duty - Google Patents
A kind of urban sewage treating device using second pond intermittent duty Download PDFInfo
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- CN206705904U CN206705904U CN201720325565.6U CN201720325565U CN206705904U CN 206705904 U CN206705904 U CN 206705904U CN 201720325565 U CN201720325565 U CN 201720325565U CN 206705904 U CN206705904 U CN 206705904U
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Abstract
A kind of method for the treatment of city waste water and device using second pond intermittent duty, belong to water-treatment technology field, formed using grid, setting pot, preliminary sedimentation tank, three sections of ponds, second pond, contact chamber and mud-collecting well, the water side in three sections of ponds is connected with distribution well, distribution well connects two groups of second ponds and mud-collecting well in parallel by converter respectively, and second pond bottom is provided with discharge pipeline, water decanter is provided with outlet pipe, mud-collecting well connects reflux sludge tube, and the reflux sludge tube other end connects three sections of ponds.Its processing method is to control three sections of pond winter sludge concentrations between 6000 8000mg/L, two groups of second ponds and mud-collecting well alternate intermittent operations in parallel.The utility model is increased second pond hydraulic detention time and sludge condensation time, is added returned sludge concentration, the increase of sludge reflux amount, dissolving oxygen transfer efficiency increase using sedimentation basin water inlet, quiet heavy, draining and spoil disposal four-stage intermittent operation mode.
Description
Technical field
The utility model belongs to water-treatment technology field, and in particular to a kind of processing method of municipal sewage and is used
Device.
Background technology
At present, the establishing criteria of municipal sewage plant's processing water water quality design is urban wastewater treatment firm pollutant emission
Standard（GB18918-2002）.Municipal sewage plant's biochemical treatment unit majority uses anaerobic- anoxic- oxic activated sludge process
（A2O methods）, the specification of design institute foundation is Code for design of outdoor sewerage engineering（GB50014-2006）With anaerobic- anoxic- oxic activity
Sludge sewage treatment project technical specification（HJ 576-2010）.Specifically processing unit is by grid, setting pot, just sunk
Pond, three sections of ponds（A2O reaction tanks, including anaerobism section, anoxic section and aerobic section, hereinafter referred to as three sections of ponds）, second pond, contact chamber and
Mud-collecting well is formed, and municipal sewage intercepts big suspension and drift by grid；Subsequently into setting pot, separate in sewage
The larger particle of proportion；Setting pot water outlet enters preliminary sedimentation tank, removes suspended particulate, mitigates the load of subsequent treatment facility；It is just heavy
After pond water outlet enters the anaerobism section in three sections of ponds with returned sludge, enter aerobic section after anoxic section mixes with backflow nitrification liquid, mix
Close liquid and biochemical reaction is carried out in three sections of ponds, entering back into second pond after degradation of organic substances is precipitated, and water outlet is entered into contact chamber
Discharged after row sterilization, and second pond is by mud-collecting well spoil disposal, a part is back to three sections of ponds, and a part is in the form of excess sludge
Discharge.
Designed according to current specifications, the northern area of China be completed operation with A2O is the sewage treatment plant of main body in the winter
Stably reaching standard typically difficult to realize when Ji Shuiwen is relatively low.Because municipal sewage plant is by design water, design water during design
Matter, design water temperature are designed, and are then checked by maximum, minimum amount of water, design can not can guarantee that in extreme environment situation
Under, also can stably reaching standard during such as low temperature.
There is sewage treatment plant dirty to improve biochemical reaction tank using dwell time of sewage, increase sludge reflux amount is extended at present
Mud concentration, and then improve secondary clarifier effluent water quality.Because during normal temperature microbial activity it is high, it is necessary to sludge concentration it is low, during low temperature
Microorganism active low, it is necessary to sludge concentration it is high, therefore during municipal sewage low temperature, it is effective to improve biochemistry pool sludge concentration
Method.But because built at present sewage treatment plant and code requirement, the reaction tank mixed liquor of high concentration enter second pond,
The disposal ability designed beyond current design specification second pond, have impact on the application of high CO_2 density.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of municipal sewage treatment using second pond intermittent duty
Device.
The utility model solve technical problem scheme be using grid, setting pot, preliminary sedimentation tank, three sections of ponds, second pond,
Contact chamber and mud-collecting well form the urban sewage treating device of second pond intermittent duty, and the water side in three sections of ponds is connected with water distribution
Well, distribution well connect left second pond and right second pond by converter respectively, and left second pond is connected with left mud-collecting well, right second pond
Right mud-collecting well is connected with, left mud-collecting well and right mud-collecting well connect three sections of ponds jointly, and left second pond and right second pond connect jointly
Pond is touched, wherein, left second pond is provided with water inlet pipe and outlet pipe, and the heavy bottom of pond portion of the second from left is provided with discharge pipeline, and water inlet pipe is by turning
Parallel operation connects the water side of distribution well, and outlet pipe connects contact chamber, and water decanter, left mud-collecting well connection backflow are provided with outlet pipe
Sludge pipe, reflux sludge tube connection return sludge pump, the reflux sludge tube other end connect three sections of ponds, and the discharge pipeline of left second pond connects
Left mud-collecting well is connect, right second pond and the heavy pool structure of the second from left are identical；Right mud-collecting well is identical with left mud-collecting well structure, in parallel relationship.
Its processing method is to control three sections of pond winter sludge concentrations between 6000-8000mg/L, left second pond and Zuo Ji
Ni Jing and right second pond and the operation of right mud-collecting well alternate intermittent, control converter make the right side for having been injected into the sewage after three sections of ponds are handled
Water inlet pipe between second pond and three sections of ponds is closed, and closes the water decanter of right second pond and the returned sludge of right mud-collecting well
Pump, after making right second pond sewage quiet heavy a period of time, the water decanter of right second pond is opened, the closing right side two is heavy after running a period of time
The water decanter in pond, while the return sludge pump of right mud-collecting well is opened, make sludge the returning by right mud-collecting well of right second pond bottom
Three sections of ponds are gone back to, and three sections of pond sludge concentrations are maintained between 6000-8000mg/L, unnecessary mud discharging falls, above-mentioned
The water inlet pipe of left second pond is always in time connects with three sections of ponds；The water inlet pipe of right second pond is opened, simultaneously closes off the second from left
The water inlet pipe in heavy pond；Left second pond and left mud-collecting well repeat quiet heavy, draining and spoil disposal action；The operation week of two of which second pond
Phase is 6~10h, and the static and run time of each second pond is 3~5h, 2~4.5h is precipitated as in running, draining is
0.5~1h, spoil disposal are 0.5~1h, and sludge reflux amount is 150~300%.
If in running at normal temperature, only with one of second pond can, another second pond is closed, simultaneously
The water inlet pipe and outlet pipe of operation second pond, and mud-collecting well return sludge pump corresponding to it are opened, is changed into a second pond and connects
Reforwarding row mode.
The second pond that normal low temperature is all run, is respectively provided with outlet pipe and water decanter, and water outlet is with straining water during low temperature intermittent duty
Device, when normal-temperature continuous is run, water outlet is directly flowed out from outlet pipe.
Its operation principle is when system hypothermia is run, first so that filling the right second pond quiescent setting of water for a period of time
（It is set as 3~5h）, so can be effectively abundant by the mixed liquor mud-water separation containing high sludge concentration, then pass through water decanter
The clear water after quiescent setting is discharged from top to bottom, carries out spoil disposal again afterwards, although higher into the sludge concentration in right second pond,
But by quiet heavy, and under the interference of no spoil disposal action, the water of discharge can reach the standard of national defined, same
Period, the left second pond that the water outlet in three sections of ponds enters, and precipitated by design time, draining and spoil disposal, while sludge is just
Often backflow.Two sedimentation basins and so on, reach the purpose of alternate intermittent operation.
It is the 1/2 of whole cycle to design flooding time, and it is whole cycle to design quiet heavy time, draining and sludge-drainage time sum
1/2.
Second pond designs：
Sedimentation basin total height
H=h1+h2+h3+h4
H-total height, 4.6-9m；
H1-protection height, takes 0.3-0.5m；
H2-available depth, 2-4m；
H3-mud moisture interface buffering layer height, takes 0.3 ~ 0.5m；
H4-sludge settling enrichment region height, 2-4m.
The utility model has the advantage that：
1st, utility model sedimentation basin water inlet, quiet heavy, draining and spoil disposal four-stage intermittent operation mode, and determine each
The design parameter in stage.
2nd, regulated and controled by PLC, the pattern of second pond intermittent duty when realizing the operation of municipal sewage continuous stream.
3rd, during two interval second pond alternate runs, when second pond is in static heavy state, second pond water is increased
Power residence time and sludge condensation time, add returned sludge concentration.
4th, compared to traditional A2O techniques, return sludge ratio can reach 150-300%, the increase of sludge reflux amount, aeration tank sludge
Concentration increase, organic loading reduce, dissolving oxygen transfer efficiency increase.
5th, utility model devises a kind of brand-new second pond for being different from traditional second pond, and determines its parameter.
Brief description of the drawings
Fig. 1 is the utility model schematic diagram；
Fig. 2 is second pond and mud-collecting well sectional view.
Embodiment
The utility model device is using 1 grid, setting pot 2,3, three sections of ponds 4 of preliminary sedimentation tank, second pond, contact chamber 10 and collection mud
Well is formed, and second pond and mud-collecting well have two respectively, and the water side in three sections of ponds 4 is connected with distribution well 5, and distribution well 5 passes through conversion
Device connects left second pond 6 and right second pond 7 respectively, and left second pond 6 is connected with left mud-collecting well 8, and right second pond 7 is connected with right collection mud
Well 9, three sections of ponds 4 of connection, left second pond 6 and right second pond 7 connect contact chamber 10 jointly jointly for left mud-collecting well 8 and right mud-collecting well 9,
Wherein, left second pond 6 is provided with water inlet pipe 11 and outlet pipe 12, and the left bottom of second pond 6 is provided with discharge pipeline 13, and water inlet pipe 11 is logical
The water side that PLC converters 14 connect distribution well 5 is crossed, outlet pipe 12 connects contact chamber 10, water decanter is provided with outlet pipe 12
15, left mud-collecting well 8 connects reflux sludge tube 16, and reflux sludge tube 16 connects return sludge pump 17, the other end of reflux sludge tube 16
Three sections of ponds 4 are connected, the discharge pipeline 13 of left second pond 6 connects left mud-collecting well 8, and right second pond 7 is identical with the left structure of second pond 6；It is right
Mud-collecting well 9 is identical with the left structure of mud-collecting well 8, in parallel relationship.
Its processing method is to control three sections of pond winter sludge concentrations between 6000-8000mg/L, left second pond and Zuo Ji
Ni Jing and right second pond and the operation of right mud-collecting well alternate intermittent, control converter make the right side for having been injected into the sewage after three sections of ponds are handled
Water inlet pipe between second pond and three sections of ponds is closed, and closes the water decanter of right second pond and the returned sludge of right mud-collecting well
Pump, after making right second pond sewage quiet heavy a period of time, the water decanter of right second pond is opened, the closing right side two is heavy after running a period of time
The water decanter in pond, while the return sludge pump of right mud-collecting well is opened, make sludge the returning by right mud-collecting well of right second pond bottom
Three sections of ponds are gone back to, and three sections of pond sludge concentrations are maintained between 6000-8000mg/L, unnecessary mud discharging falls, above-mentioned
The water inlet pipe of left second pond is always in time connects with three sections of ponds；The water inlet pipe of right second pond is opened, simultaneously closes off the second from left
The water inlet pipe in heavy pond；Left second pond and left mud-collecting well repeat quiet heavy, draining and spoil disposal action；The operation week of two of which second pond
Phase is 8 hours, and the static and run time of each second pond is 4 hours, is precipitated as in running 3 hours, draining 0.5
Hour, spoil disposal is 0.5 hour, and sludge reflux amount is 150~300%.
If in running at normal temperature, only with one of second pond can, another second pond is closed, simultaneously
The water inlet pipe and outlet pipe of operation second pond, and mud-collecting well return sludge pump corresponding to it are opened, is changed into a second pond and connects
Reforwarding row mode.
The second pond that normal low temperature is all run, is respectively provided with outlet pipe and water decanter, and water outlet is with straining water during low temperature intermittent duty
Device, when normal-temperature continuous is run, water outlet is directly flowed out from outlet pipe.
It is the 1/2 of whole cycle to design flooding time, and it is whole cycle to design quiet heavy time, draining and sludge-drainage time sum
1/2.
Second pond designs：
Second pond total height
H=h1+h2+h3+h4
H-total height, 7m；
H1-protection height, takes 0.4m；
H2-available depth, 3m；
H3-mud moisture interface buffering layer height, takes 0.4m；
H4-sludge settling enrichment region height, 3m.
Claims (1)
- A kind of 1. urban sewage treating device using second pond intermittent duty, it is characterised in that：It include grid, setting pot, Preliminary sedimentation tank, three sections of ponds, second pond, contact chamber and mud-collecting well are formed, and the water side in three sections of ponds is connected with distribution well, and distribution well passes through Converter connects left second pond and right second pond respectively, and left second pond is connected with left mud-collecting well, and right second pond is connected with right collection mud Three sections of ponds of connection, left second pond and right second pond connect contact chamber jointly jointly for well, left mud-collecting well and right mud-collecting well, wherein, it is left Second pond is provided with water inlet pipe and outlet pipe, and the heavy bottom of pond portion of the second from left is provided with discharge pipeline, and water inlet pipe connects water distribution by converter The water side of well, outlet pipe connect contact chamber, and water decanter is provided with outlet pipe, and left mud-collecting well connects reflux sludge tube, backflow Sludge pipe connects return sludge pump, and the reflux sludge tube other end connects three sections of ponds, and the discharge pipeline of left second pond connects left mud-collecting well, Right second pond and the heavy pool structure of the second from left are identical；Right mud-collecting well is identical with left mud-collecting well structure, in parallel relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325565.6U CN206705904U (en) | 2017-03-30 | 2017-03-30 | A kind of urban sewage treating device using second pond intermittent duty |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325565.6U CN206705904U (en) | 2017-03-30 | 2017-03-30 | A kind of urban sewage treating device using second pond intermittent duty |
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| CN206705904U true CN206705904U (en) | 2017-12-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830567A (en) * | 2017-03-30 | 2017-06-13 | 长春工程学院 | A kind of method for the treatment of city waste water and device of the intermittent duty of use second pond |
| CN110075578A (en) * | 2019-05-30 | 2019-08-02 | 格林美（武汉）城市矿产循环产业园开发有限公司 | A kind of wet concentration is double to stand pond mud-removing system |
-
2017
- 2017-03-30 CN CN201720325565.6U patent/CN206705904U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830567A (en) * | 2017-03-30 | 2017-06-13 | 长春工程学院 | A kind of method for the treatment of city waste water and device of the intermittent duty of use second pond |
| CN110075578A (en) * | 2019-05-30 | 2019-08-02 | 格林美（武汉）城市矿产循环产业园开发有限公司 | A kind of wet concentration is double to stand pond mud-removing system |
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